Elevator-gate.



PATENTED AUG. 16, 1904.

F. A. SWENSON.

ELEVATOR GATE.

APPLICATION FILED MAR. so, 1903.

4 SHEETS-SHEET 1.

N0 MODEL.

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" Wz'ih'esses: Invenior WMWU I.

PATENTED AUG. 16, 1904.

F. A. SWBNSON.

I ELEVATOR GATE.

APPLIUATIOK rmm MAR. so, 1903.

4 SHEETS-SHEET 2.

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Inventor Witnesses;

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PATENTED AUG. 16, 1904.

F. A. SWENSON. ELEVATOR GATE.

APPLICATION FILED MAR. so, 1903.

4 SHEETSSHEET 3 H0 MODEL.

Inventor JmJ/U/C ,Ju/mwv Wiinesses: M

PATENTED AUG. 16, 1904.

F. A. SWENSON. ELEVATOR GATE.

APPLICATION FILED MAR. so, 1903.

4 SHEETS-SHEET 4.

' N0 MODEL.

Wiin eases:

UNITED STATES Patented August 16, 1904.

PATENT OFFICE.

ELEVATOR-GATE.

SPECIFICATION forming part of Letters Patent No. 767,850, dated August 16, 1904.

Application filed March 30, 1903.

To all whom it may concern:

Be it known that I, FRANK A. SWENSON, a

' citizen of the United States of America, re-

siding in Kansas City, in the county of Jackson and State of Missouri, have invented a new and useful Improvement in Elevator- Gates, of which the following is a specification, reference being had therein to the accompanying drawings, forming a part thereof.

My invention relates to improvements in elevator-gates. Y

The object of my invention is to provide an elevator-gate for closing the hatchway' of an elevator, in which the gate is normally locked in a closed position, means being provided by which the elevator-car arriving at the floor at which the gate is located releases the gate and permits its being moved to the open position, locking means being provided for engaging and locking the gate in the open position, and means controlled by the movement of the elevator away from the floor for releasing the gate from the means which locks it in the open position.

My invention provides, further, means by which when the gate is released from the mechanism which locks it in the open position the gate may be moved automatically to the closed position.

My invention provides, further, two gates pivotally mounted and adapted to be swung so as to close the hatchway-opening, means being provided by which the gates are held locked when in the closed position, means by which the gates may be released from the said locking means when the elevator arrives at the floor at which the gates are located, means for engaging and locking the gates in the open position, and means actuated when the elevator moves from the floor for releasing the gates from the means which looks them in the open position.

Other novel features are hereinafter fully described and claimed.

In the accompanying drawings, which illustrate my invention, Figure 1 is a perspective View showing two gates pivotally mounted at the opening of a hatchway, one of the gates being shown locked in the open position, the other gate being shown in the closed position serial No. 150,326. (No model.)

with a portion broken away, and the elevatorcar, a portion of which is shown, being at the floor at which the gates are located. Fig. 2 is a top view showing both gates in the open position, the car being at the floor at which the gates are located. Fig. 3 is a view similar to that shown in .Fig. 2, the gates being closed and the car having moved downward. Fig. 4 is a vertical sectional view taken on the dotted line a 6 of Fig. 2. Fig. 5 is a side elevation view of one of the locking devices for holding one of the gates in the open position, some of the parts being shown in vertical section. In this view the reciprocating horizontal bolt is shown forced rearwardly by one of the rollers carried by the car. Fig. 6 is a vertical sectional view taken on the dotted line 0 (Z of Fig. 4. Fig. 7 is a horizontal sectional view taken on thedotted line 6 of Fig. 4., some of the parts being shown in plan. Fig. 8 is a vertical sectional View taken on the dotted line g it of Fig. 2, the car being shown at the floor and one gate shown in the open position. Fig. 9 is a view similar to that shown in Fig. 8, distant parts being omitted and the car being shown as having moved upwardly. In this view the gate is shown in elevation in the closed position. In dotted lines the gate is shown in the position when it is about to depress the locking-bolt. Fig. 10 is a side elevation view of the mechanism which holds the gates locked in the closed position. Fig. 11 is a view, partly in plan and partly in horizontal section, of the mechanism shown in Fig. 9, the cam on the elevator being in position to force rearwardly the reciprocating bolt which controls the depression of the vertically-movable locking-bolts. Fig. 12 is a vertical sectional view taken on the dotted line z' j of Fig. 10.

Similar characters of reference indicate similar parts.

1 indicates the floor, on which are secured two vertical posts 2 and 3, disposed one at each side of the opening leading to the hatchway.

4 and 5 indicate two gates pivotally mounted on the two posts 2 and 3, respectively.

6 is a coil-spring having one end secured to the post 2 and the other end to the gate 4, the

tension of the spring being such as to normally swing the gate from the open to the closed position. 7 indicates a similar spring similarly mounted upon the gate 5 and the post 3 and having a tension such as will force the gate 5 to the closed position. To secure the gates in the closed position, the following mechanism is provided.

Referring particularly to Figs. 8, 9, 10, 11, and 12, 8 indicates a horizontal plate secured in a recess cut in the floor midway between the posts 2 and 3, the plate being provided at the end next the elevator-shaft with a downwardly-extending projection 9, in which is mounted the inner end of a horizontal bolt 10, which is provided with an outer screw-threaded forward end, which extends through an opening in the vertical arm of a bell-crank lever 11, pivotally mounted in a boxing 12, securedto the under side of the plate 8. The other end of the bell-crank lever 11 is provided with two arms which extend horizontally forward and engage each a peripheral groove in the upper end of one of two verticall y-movable parallel bolts 13 and 14, respectively. v The upper ends of the bolts 13 and 14 are mounted in holes provided therefor in the plate 8, the lower ends of the bolts being mounted in vertical holes provided in the horizontal portion of a U-shaped bracket'15, the upper end of which is secured to the lower side of the plate 8. lever 11 on the screw-threaded portion of the bolt 10 is mounted a nut 16. The two nuts 16 can be adjusted lengthwise of the bolt 10 and form abutments against which the lever 11 may hear.

The inner end of the bolt 10 is bifurcated and has mounted rotatably between the arms thereof a roller 17, adapted to be struck bya cam 18 on the forward side of the elevator-car platform 19 and forced from the position shown in Fig. 9 to the position shown in Fig. 8. On the lower side of each gate 4 and 5 is mounted a horizontal shoe 20, the inner side of which is upwardly inclined. The shoe 20 on each gate is provided with a vertical 'hole adapted when the gate is closed to receive the upper end of the vertically-rnovable bolt 13 or 14, as the case may be, thus locking the gate in the closed position. When "the elevator-car is brought to the floor, as

shown in Fig. 8, the bolt 10 is forced rearwardly, rocking the bell-crank lever 11 in a direction such that the bolts 13 and 14 will be depressed, and thus released from the shoes 20 on the gates 4 and 5, which may then be swung to the position shown in Fig. 2. En= circling the bolts 13 and 14, respectively, are the coil-springs21 and 22, the lower ends of which bear upon the bracket 15 and the upper ends of which bear upon the annular flanges 23, provided one on each bolt 13 and 14. VVhe'n the elevator-car platform leaves the floor, as shown in Fig. 9, the springs 21 At each side of the bell-crank and 22 again force the parts to the position shown in Fig. 9.

The mechanism for locking the gates in the open position is arranged as follows: Referring particularly to Figs. 4, 5, 6, and 7, 24 indicates two flat plates mounted on the floor, one near the post 2 and the other near the post 3. l.he'forward end of each plate is provided with a vertical downwardly-extending projection 26, having a transverse hole therein in which is reciprocatively mounted one end of a horizontal bolt 27 the other end of which is screw-threaded and extends through a hole in the downwardly-extending arm of a bell-crank lever 28, pivotally mounted in a boxing 29, secured to the under side of the plate 24. Upon the plate 24 are secured the upper ends of the arms of a U-shaped bracket 30, the horizontal portion of which is provided with a vertical hole in which is mounted a vertically-movable bolt 31, the upper end of which is mounted in a vertical hole in the plate 24. The upper end of each bolt 31 is provided with a peripheral groove below the plate 24, in which is mounted the other arm of the bell-crank lever 28. A coil-spring 32 encircles the bolt 31 and bears at its lower end upon the bracket 30 and at its upper end upon a peripheralflange 33 on the bolt 31. The tension of each spring 32 is such as to tend normally to force the bolt 31, upon which it is mounted, to the position shown in Fig. 4. Upon the screw-threaded end of each horizontal bolt 27, at each side of the bell-crank lever 28, is mounted a nut 34. These nuts 34 serve as abutments, against which the bell-crank lever may bear. Upon the platform 19 of the elevator-car, at each side of 35, upon which are rotatably mounted two rollers 36 and 37, disposed so as to strike the adjacent end of the horizontal bolt 27, located on the adjacent side of the hatchwayopening. Two brackets 38 are secured one to the lower side of each gate 4 and 5. The forward side of each bracket 38 is provided projection 39, adapted when the gate is swung to the open position, as shown in Fig. 4, to strike and depress the adjacent bolt 31. After the bracket 38 has passed the bolt 31 the coilspring 32 forces the bolt upward in the path of the bracket and prevents the gate being closed until the bolt 31 has been again depressed. As soon as the elevator-platform 19 leaves the floor one of the rollers 36 or 37 will strike thebolt 27, forcing it rearwardly to the position shown in Fig. 5, at which time the bell-crank lever will be swung so as to depress the bolt 31 against the pressure of the spring 32, thus permitting the gate to be swung by the retracting-spring mounted upon it to the closed position, where the gate will i be locked, as already described.

with a forw ardly-extend in g upwardly-inclined the front thereof. is mounted a vertical plate In operating my invention when the car arrives at a floor at which it is desired to stop the cam 18 on the platform 19 strikes the roller 17 and forces it, with the bolt 10, rearwardly, thus depressing, as already described, the two bolts 13 and 14, which engage the shoes 20 on the gates 4 and 5. The gates being released may be swung to the open position, (shown in Fig. 2,) in which position they are held by the bolts 31, engaging with the brackets 38 on the bottom sides of the gates. While the car remains at the floor the springs 32 will hold I the bolts 31 engaged with the gates; but as soon as the car leaves the floor in moving upward or downward one of the rollers 36 or 37 will strike the adjacent end of the bolt 27 adjacent to it and force the bolt rearwardly, thus depressing the bolt 31 and releasing the gate on that side of the car. In Fig. 5 I have shown the rollers 36 and 37 as having been carried downward by the car and the upper roller 36 as having struck the bolt 27. The same result would have occurred if the car had moved upwardly and the roller 37 had struck the bolt 27. While the platform 19 is at the floor the adjacent end of the bolt 27 lies between the two rollers 36 and 37, and the spring32 keeps the bolt 31 in the raised position. As soon as the car in leaving the floor releases the gates 4 and 5, as described hereinbefore, the coil-springs 6 and 7 force the gates to the closed position, the shoes of the gates engaging with the raised bolts 13 and 14 and preventing the gates from being opened until the cam 18 on the car again forces back the bolt 10. In case it is desired to adjust the bolts 27 forward or backward relative to the crank-levers 28, so as to have the ends of the bolts 27 project more or less into the hatchway, it can be done by adjusting the nuts 34 lengthwise on the bolts 27. 7 Similar adjustment of the bolt. 10 relative to the bell-crank lever 11 may be made by adjusting the nuts 16- lengthwise on the bolt 10. A stop-strip 40, secured upon the upper side of the floor 1 parallel with the forward side of the hatchway, prevents the gates swinging too far when swung to the closed position.

My invention may be modified in many ways without departing from its spirit.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-- l 1. In an elevator-gate mechanism, the combination with a pivotally-mounted gate, of a vertically-movable .bolt, a spring normally holding the bolt raised, means by which when the gate is swung to the open position the gate is engaged by the said bolt, a horizontal bolt reciprocally mounted, a bell-crank lever piv' otally mounted andconnected. by one arm to the horizontal bolt and with the other arm to the vertical bolt, means by whichwhen the elevator-car is moved upward or downward from the floor at which the gate is located, the horizontal bolt will be moved in a direction such that the bell-crank lever will depress bination with the pivotally-mounted gate, of.

a frame adapted to'be supported on the floor, a bolt vertically movable in the said frame, a bell-crank lever pivotally mounted in said frame and having one arm engaging the said.

bolt, ahorizontally-movable bolt mounted in said frame and engaging the other arm of said bell-crank lever, a spring normally forcing the vertically-movable bolt to the raised position, means connected with the gate for engaging the vertically-movable bolt when the said bolt is in the raised position, means connected with the elevator-car for forcing the horizontally movable bolt in a direction such that the bell-crank lever will be swung and the vertically-movable bolt depressed, and means for closing the gate when it is released from the said vertically-movable bolt.

3. In an elevator-gate mechanism, the combination with the pivotally-mounted gate, of a spring connected thereto for closing the same, a frame adapted to be supported on the floor, a bolt vertically movable in said frame, a spring normally forcing said bolt into the raised position, a horizontally movable bolt mounted in said frame, a bell-crank lever pivotally mounted in said frame and connected respectively with its arms to the two said bolts, means by which the gate engages with and is held in the open position by the vertically-movable bolt when the said bolt is in the raised position, and means connected with the elevator-car for moving the horizontally-movable bolt in. a direction such that the bellcrank lever will depress the vertically-movable bolt and permit the gate to close.

4. In an elevator-gate mechanism, the combination with a pivotally-mounted gate, of means for holding the gate in the open position controlled by the movement of the car, a spring connected with and normally forcing the gate from an open to a closed position, a slidable bolt which when in one gages with and holds the gate in the closed position, means for normally forcing said bolt to said position, and means controlled by the position of the elevator-car for moving said bolt to release the gate therefrom.

5. In an elevator-gate mechanism, the combination with two pivotally-mounted gates, of two vertically-slidable bolts which are adapted when in the raised position to engage and lock thegates in the closed position, means for normally forcing the said bolts to the raised posiposition en\ IIO &

tion, and means controlled by the position of the car for depressing the said bolts and releasing the gates therefrom.

6. In an elevator-gate mechanism, the combination with two pivotally-mounted gates, of two vertically-slidable bolts adapted when in the raised position to engage and lock the gates in the closed position, a reciprocating slidable bolt, means for normally forcing the said two vertically-slidable bolts to the raised position, means by which when the reciprocating bolt is moved in one direction the two vertically-slidable bolts will be depressed, and means controlled by the position of the elevator-car for so moving the reciprocating bolt.

7. In an elevator-gate mechanism, the combination with two pivotally-mounted gates, of two vertically-slidable bolts adapted when in the raised position to engage and lock the gates in the closed position, means for normally forcing the said bolts to the raised position, a reciprocating slidable bolt, a lever connecting the two bolts and the said reciprocating bolt for-depressing the two vertically-slidable bolts when the reciprocating bolt is moved in the proper direction, and means controlled by the position of the elevator-car for so moving the reciprocating bolt.

8. In an elevator-gate mechanism, the combination with two pivotally-mounted gates, of two shoes carried by the said gates one shoe on each gate, each shoe being provided with a vertical hole, two vertically-slidable bolts adapted when the gates are in the closed position to enter respectively the said holes, means normally forcing the two bolts to the raised position, and means controlled by the position of the elevator-car for depressing the two bolts below the shoes.

9. In an elevator-gate mechanism, the combination with two pivotally-mounted gates, of a frame adapted to be mounted on the floor, two vertically-slidable bolts mounted in said frame and adapted when in the raised position to engage and lock the two gates in the closed position, means for normally forcing the two bolts to the raised position, a bolt reciprocatively mounted in said frame, means by which when the reciprocative bolt is moved in one direction the two bolts will be depressed, and

means controlled by the position of the elevatoii-car for so moving the said reciprocative 00 t.

10. In an elevator-gate mechanism, the com bination with two pivotally-mounted gates, of a frame adapted to be secured to the floor, two vertically-slidable bolts mounted in said frame and adapted when in the raised position to engage and lock the gates in the closed position, means for normally forcing the two said bolts to the raised position, a bolt reciprocatively slidable in said frame, a bell-crank lever pivotally mounted in said frame and engaging with its arms respectively the reciprocating bolt and the two vertically-slidable bolts and adapted when moved in the proper direction to depress the two bolts, and means controlled by the position of the elevator-car for so moving the reciprocating bolt.

11. In an elevator-gate mechanism, the combination with a movable bolt, a pivotallymounted gate provided with means for engaging the bolt when the bolt is properly positioned, means for so positioning the bolt, a

pivoted lever having one arm engaging the said bolt and adapted to move the bolt when properly swung, a reciprocative bolt, means actuated by the car for moving said reciprocative bolt, and adjustable means for connecting the reciprocative bolt with the other arm of said lever.

12. In an elevator-gate mechanism, the combination with a movable bolt, of a pivotallymounted gate provided with means for engaging the bolt when the bolt is properly positioned, means for so positioning the bolt, a pivoted lever having one arm engaging said bolt for moving the bolt when the lever is properly swung, the other arm of the lever being bifurcated, a reciprocative bolt having one screw-threaded end which is embraced by the bifurcated end of said lever, two nuts mounted on said bolt at each side of the said lever, for adjusting the same relative to the bolt, and means actuated by the car for moving the bolt in one direction.

13. In an elevator-gate mechanism, the combination with a pivotally-mounted gate, of a bolt adapted when properly moved for engaging the same, a pivoted lever one arm of which engages and moves said bolt, a screwthreaded reciprocative bolt, two nuts on said threaded bolt disposed one at each side of the other arm of the lever for moving said lever, means actuated by the car for moving the threaded bolt in one direction, and a spring for moving the bolt in the other direction.

14. In an elevator-gate mechanism, the combination with two pivoted gates, of a pair of bolts adapted respectively when properly moved to engage said gates, a pivoted lever having three arms, two of which engage and move said bolts respectively, a reciprocative bolt, means for adjustably connecting the third arm of the lever with said reciprocative bolt, means actuated by the car for moving the reciprocative bolt in one direction, and means for retracting said bolt.

15. In an elevator-gate mechanism, the combination with two pivoted gates, of a pair of bolts adapted respectively when properly moved to engage said gates, a pivoted lever having three arms, two of which engage and move said bolts respectively, a threaded reciprocative bolt, two nuts mounted on the threaded part of said bolt and disposed at each side of the third lever-arm, means actuated. by the car for moving said threaded bolt in one direction, and means for retracting said threaded bolt.

16. In an elevator-gate mechanism, the combination with a pivotally-mounted gate, of means for holding the gate in the open position controlled by the movement of the car, means for normally forcing the gate from the open to the closed position, a slidable bolt which when in one position engages with and holds the gate in the closed position, means for normally forcing said bolt to said position, and means controlled by the elevator-car for moving said bolt to release the gate therefrom.

17. In an elevator-gate mechanism, the combination with a pivotally-mounted gate, of a slidable bolt which when in one position engages with and holds the gate in the open position, means controlled by the car for moving the said bolt to said position, means for retracting the bolt from said position, means for normally forcing the gate from the open to the closed position, a second slidable bolt which when in one position is adapted to engage with and hold the gate in closed position, means for normally forcing said second bolt to said position, and means controlled by the elevator-car for moving said bolt to release the gate therefrom.

In testimony whereof I have signed my name to this specification in presence of two subscribing witnesses.

FRANK A. SVVENSON.

Witnesses:

WARREN D. Honsn, R. E. HAMILTON. 

